4-Methyl-2H-1,3-oxazine-2,6(3H)-dione

Abstract

In the title compound, C5H5NO3, the planar (maximum deviation = 0.075 Å for the ring O atom) molecules form N—H...O hydrogen bonds in a zigzag chain (C—O...N bond angle ≃ 140°) between glide-related molecules.